/* Header Fix CSS - แก้ไขปัญหา header overlap */
.modern-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.modern-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

/* เพิ่ม padding-top ให้ body เพื่อไม่ให้ header ทับเนื้อหา */
body {
    padding-top: 80px; /* ปรับตามความสูงของ header */
}

/* Hero section adjustment */
.hero-section {
    margin-top: 0;
    padding-top: 2rem;
}

/* Mobile responsive */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    
    .hero-section {
        padding-top: 1rem;
    }
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Navigation links hover effect */
.nav-links a:hover {
    color: #e74c3c;
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

/* Mobile menu improvements */
.mobile-menu {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}